X0306 4 2018-12-13 0 0001698990 Magnolia Oil & Gas Corp MGY 0001026545 CHAZEN STEPHEN I 1001 FANNIN STREET SUITE 400 HOUSTON TX 77002 1 1 0 0 Chairman, President & CEO Class A Common Stock 2018-12-13 4 P 0 20000 A 1742783 D Class A Common Stock 2018-12-14 4 P 0 45000 A 1787783 D Warrants (option to buy) 11.50 2018-12-13 4 P 0 10000 A 2018-12-13 2023-07-31 Class A Common Stock 10000 131952.33 D Warrants (option to buy) 11.50 2018-12-14 4 P 0 20000 2.95 A 2018-12-14 2023-07-31 Class A Common Stock 20000 151952.33 D On December 13, 2018, Mr. Chazen acquired, at a weighted average price of $11.195187 per share, 20,000 shares of the issuer's Class A common stock. Such shares were purchased in multiple transactions at prices ranging from $11.1319 to $11.30, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares or warrants, as applicable, acquired at each separate price within the ranges set forth in footnotes (1), (3) and (4) to this Form 4. On September 17, 2018, Mr. Chazen filed a Form 4 that inadvertently reported that, following his purchase of 10,000 shares of the issuer's Class A common stock, he owned 1,700,931 shares. In fact, Mr. Chazen directly owned 1,722,783 shares of the issuer's Class A common stock. Following his purchase of an aggregate of 20,000 shares of the issuer's Class A common stock on December 13, 2018, he owned 1,742,783 shares. On December 14, 2018, Mr. Chazen acquired, at a weighted average price of $11.09662 per share, 45,000 shares of the issuer's Class A common stock. Such shares were purchased in multiple transactions at prices ranging from $11.00 to $11.20, inclusive. On December 13, 2018, Mr. Chazen acquired, at a weighted average price of $2.985 per warrant, 10,000 of the issuer's publicly traded warrants. Such warrants were purchased in multiple transactions at prices ranging from $2.97 to $3.00, inclusive. On December 14, 2018, Mr. Chazen acquired 20,000 of the issuer's publicly traded warrants in multiple transactions, each at a price of $2.95 per warrant. Exhibit 24 - Power of Attorney /s/ Timothy D. Yang 2018-12-17